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Cell type-specific plasticity of striatal projection neurons in parkinsonism and L-DOPA-induced dyskinesia

Nature Communications, ISSN: 2041-1723, Vol: 5, Issue: 1, Page: 5316
2014
  • 222
    Citations
  • 0
    Usage
  • 264
    Captures
  • 2
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    222
  • Captures
    264
  • Mentions
    2
    • Blog Mentions
      1
      • Blog
        1
    • References
      1
      • Wikipedia
        1

Article Description

The striatum is widely viewed as the fulcrum of pathophysiology in Parkinsonâ €™ s disease (PD) and L-DOPA-induced dyskinesia (LID). In these disease states, the balance in activity of striatal direct pathway spiny projection neurons (dSPNs) and indirect pathway spiny projection neurons (iSPNs) is disrupted, leading to aberrant action selection. However, it is unclear whether countervailing mechanisms are engaged in these states. Here we report that iSPN intrinsic excitability and excitatory corticostriatal synaptic connectivity were lower in PD models than normal; L-DOPA treatment restored these properties. Conversely, dSPN intrinsic excitability was elevated in tissue from PD models and suppressed in LID models. Although the synaptic connectivity of dSPNs did not change in PD models, it fell with L-DOPA treatment. In neither case, however, was the strength of corticostriatal connections globally scaled. Thus, SPNs manifested homeostatic adaptations in intrinsic excitability and in the number but not strength of excitatory corticostriatal synapses.

Bibliographic Details

Fieblinger, Tim; Graves, Steven M; Sebel, Luke E; Alcacer, Cristina; Plotkin, Joshua L; Gertler, Tracy S; Chan, C Savio; Heiman, Myriam; Greengard, Paul; Cenci, M Angela; Surmeier, D James

Springer Science and Business Media LLC

Chemistry; Biochemistry, Genetics and Molecular Biology; Physics and Astronomy

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